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Persistent downpours will raise the flood risk in part of the mid-Atlantic into Friday night, while rain will spread over the rest of the northeastern United States into the weekend.
While the cool and rainy weather into this weekend will have people reaching for jackets and sweaters, some may need to keep an eye on streets and basements for flooding.
Highs will mainly range from the lower 60s F to the middle 70s into this weekend. However, the combination of wind, rain and other conditions will cause AccuWeather RealFeel® Temperatures to be in the 40s and 50s at times.
Storm to raise flood risk in mid-Atlantic
"The slow-moving storm will bring periodic heavy rains to much of the mid-Atlantic through Friday," AccuWeather Meteorologist Edward Vallee said.
The storm system has produced a foot of rain in some communities of the Delmarva Peninsula and 4-8 inches of rain in other parts of Virginia and Maryland, as well as West Virginia.
While the greatest threat for flooding has passed, any additional downpours may cause highly localized flooding.
The bulk of the flooding will be restricted to urban areas and along small streams, Valley stated.
Motorists should anticipate delays during their commutes due to poor visibility and high water during the downpours.
Isolated urban flooding has occurred as far to the west as Detroit and as far to the south as Fayetteville, North Carolina. Motorists should never attempt to drive through flooded roadways.
Downpours, fog and a low cloud ceiling can also lead to occasional airline delays from Detroit to Pittsburgh, Philadelphia, New York City and Boston.
Some rain to reach drought areas of New England
Farther north, rain-free weather will hold on over much of New England for a time.
Much of New England and New York state are in need of soaking rainfall due to long-term abnormally dry to extreme drought conditions.
"Some beneficial rain may enter the southern and western parts of these areas on Friday and the balance during the weekend," Vallee said.
Enough rain may fall on parts of New York state and southern New England to get small streams flowing and put a small amount of water back into ponds, lakes and reservoirs. However, the storm will not drop enough rain to completely alleviate extreme drought.
Following the pockets of heavy rain into Friday night, rainfall over much of the mid-Atlantic is likely to become more sporadic in nature during this weekend.
There is a chance Matthew may track northward enough to impact the weather in the Eastern states later next week.
Minor issues anticipated in coastal areas
In addition to areas of soaking rain and urban flooding, coastal flooding will be possible from Virginia to eastern Massachusetts at times of high tide. Minor to moderate coastal flooding will extend along the Maryland, Delaware and New Jersey coasts, as well as along the Chesapeake Bay with tides running 2-3 feet above normal through Friday.
Because of the proximity of the new moon, astronomical tides are higher than much of the rest of the month.
Winds blowing onshore will push some Atlantic Ocean water and waves toward the coast, which can cause overwash on some low-lying beach roads and sea and bay water to invade some communities.
Since above-normal tides and rough surf will persist for more than a few hours, minor beach erosion is likely.
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